Firefox no longer works with Mac OS X 10.4 or PowerPC processors

No one has helped translate this article yet. If you already know how localizing for SUMO works, start translating now. If you want to learn how to translate articles for SUMO, please start here.

Note: This article only applies to Mac OS X.

Firefox 3.6.28 is the last version of Firefox that works with Mac OS X 10.4 (Tiger) or with Mac OS X 10.5 (Leopard) on a computer with a PowerPC processor. To keep your personal information safe, we recommend you switch to a newer computer capable of running OS X Yosemite (10.10) if possible. This article covers your options.

For a computer with Mac OS X 10.5 and an Intel processor, see this article instead:

Option 1: Switch to a newer computer

Apple stopped supporting Mac OS X 10.4 (Tiger) in 2007 and support ended for Mac OS X 10.5 (Leopard) in 2009. Many software makers have either dropped support for these older systems, or soon will. Your best bet is to get a computer capable of running the latest version of OS X - Yosemite (10.10). This is the most secure option and will allow you to run the latest and greatest Firefox.

Option 2: Continue to use your older Mac and Firefox 3.6.28

If you can't switch to a newer computer, you can continue to use Mac OS X 10.4, or Mac OS X 10.5 with a PowerPC processor, and Firefox 3.6.28 - they will continue to work. However, you will no longer receive stability and security updates for Firefox. See the Security Advisories for Firefox for a list of vulnerabilities fixed in past releases.

Warning: Continuing to use Mac OS X 10.4 or Mac OS X 10.5 is no longer supported by Apple and poses a significant security risk.

If you need to reinstall Firefox 3.6.28, you can download it from this link: